Tagumo would be the normal reading of her kanji, but the furigana shows "Taun" The first translators probably changed it because "taun" reads weird to english speakers compared to Tagumo. Shizuka is just my mistake because I'm tired.
It must be either that or the yuri angle. I'll be 100x more surprised if she just straightforwardly likes him and is an airhead with no ulterior motives.